BasicStudents matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.

At Grade (Proficient)Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.

AdvancedStudents matched to this level are ready for material that requires superior performance and mastery.

Introduces evolution, variation in a population, and natural selection. A long yet interesting video, the relationships between evolution and natural selection as well as natural selection and variation are explained.

Looks at velvet worms as an example of an old body form that still persists in some ecosystems. Seeks to get students to consider the basis of science and question their existing perceptions on the organization of life.